您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 1    February 2005

[PDF Download]    [Flash Online]

    

Structure and electrochemical performance of spinel LiMn2O4 synthesized by mechanochemical process
LI Yun-jiao(李运姣), HONG Liang-shi(洪良仕), LI Hong-gui(李洪桂),
ZHAO Zhong-wei(赵中伟), HUO Guang-sheng(霍广生)

School of Metallurgical Science and Engineering, Central South University, 
Changsha 410083, China

Abstract:Spinel LiMn2O4 of cathode materials for lithium rechargeable batteries were synthesized by mechanochemical process, using Li2CO3 and different manganese compounds as EMD, Mn2O3 and Mn3O4. The influence of technological conditions on the phase structure and electrochemical performance of samples were systematically investigated by XRD, SEM, BET and constant current cyclic tests, respectively. It is found that the species of manganese compounds have strong effect on the structure and electrochemical performance of the final products. All the final products show spinel structure but their crystallization has feeble difference. And sample from Mn2O3 shows a typical octahedron shape. The initial discharge capacities of the samples are 131.44mA•h/g(made by EMD), 126.17mA•h/g(made by Mn2O3) and 126.34mA•h/g(made by Mn3O4), respectively. The product made by EMD shows well cyclic capability, and it can be used as a promising cathode material for 4V lithium batteries.

 

Key words: manganese source; lithium ion battery; LiMn2O4; mechanochemistry

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn